CN1014337B - Method of assisted production of effluent to be produced contained in geological formation - Google Patents
Method of assisted production of effluent to be produced contained in geological formationInfo
- Publication number
- CN1014337B CN1014337B CN87104473A CN87104473A CN1014337B CN 1014337 B CN1014337 B CN 1014337B CN 87104473 A CN87104473 A CN 87104473A CN 87104473 A CN87104473 A CN 87104473A CN 1014337 B CN1014337 B CN 1014337B
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- Prior art keywords
- oil
- exit pipe
- effluent
- well
- oil exit
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- 230000005012 migration Effects 0.000 claims abstract description 8
- 238000013517 stratification Methods 0.000 claims description 71
- 230000002026 carminative effect Effects 0.000 claims description 27
- 230000002787 reinforcement Effects 0.000 claims description 26
- 239000012530 fluid Substances 0.000 claims description 24
- 230000007704 transition Effects 0.000 claims description 19
- 238000005065 mining Methods 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000003129 oil well Substances 0.000 claims description 10
- 238000001802 infusion Methods 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 claims description 3
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
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- 239000011435 rock Substances 0.000 description 4
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- 239000001569 carbon dioxide Substances 0.000 description 2
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- 238000010009 beating Methods 0.000 description 1
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- 238000004140 cleaning Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
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Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Edible Oils And Fats (AREA)
- Earth Drilling (AREA)
Abstract
The present invention provides a method for producing an effluent contained in a geological formation forming a reservoir for said effluent or producing formation, including a central well, at least one subhorizontal drain as well as a displacing or displacement agent, the displacement agent being injected into the formation either from the central well or from the subhorizontal drain and the displacement agent causes migration of the effluent to be produced.
Description
The present invention relates to contain in a kind of geological stratification the auxiliary mining method of oil effluent (particularly viscosity), this geological stratification remains that production flow goes out thing and is above impervious geological stratification to effluent topped not containing at another.
The method according to this invention can be exploited better to contain and remained production flow and go out the geological stratification of thing, and with respect to patent US-A-3, the method that the prior aries of 386,502 narrations are used has limited the quantity of drilling well.
According to above-mentioned existing patent, a bite main shaft is holed, and some other well is called as service well.These service wells tilt, and remain production flow and go out on the geological stratification horizon of thing and link to each other with main shaft containing.
The produce oil mechanism that above-mentioned existing patent is narrated is that the part of service well is to be arranged in oil-producing formation, is used to collect near the effluent to be exploited that is in the service well.
On the other hand,, use the gravity phenomenon to exploit, guide effluent into main shaft according to above-mentioned existing patent.Yet, remain geological stratification that production flow goes out thing and be included in other two and do not have and wait to exploit between the geological stratification of effluent when containing, the intensity of gravitational effect is limited by being included in the height that has between the service well position of waiting to exploit the overburden of effluent geological stratification and feed main shaft.
According to above-mentioned existing patent, this can only be to equal to contain to remain the geological stratification height of production fluid highly at most.
Existing document CH-A-653,741 have narrated the produce oil method of three kinds of well types of a kind of use, be a bite center oil-producing well, the peupendicular hole that first series is holed in oil-bearing layer and the well of second series are to pass oil-bearing layer and center oil-producing well below oil-producing formation is connected.The vertical component of each well is to be on the coaxial clyinder.
Insert electrode in the well of first series with the heating oil-producing formation, and water vapour is injected oil reservoir.
The solvent that circulates is arranged in the well of second series.
The objective of the invention is to propose a kind of method for the treatment of the production fluid recovery ratio of improving.
For some embodiment, this improvement is expressed as preferable recovery ratio, and this is because the increase of gravitational effect and the displacement of reservoir oil and be expressed as and use the drilling well of lowering quantity to exploit in extensive region.
For improving the purpose of mining system productivity ratio, proposed according to the present invention initial or carminative is injected geological stratification with the purge reservoir like horizontal oil exit pipe from one or several since a main shaft.
For like horizontal oil exit pipe, its gradient is near 90 °, but actual be inaccessiable.
The advantage of this new system can:
-limit of mining is reservoir widely, particularly contains the reservoir than light viscosity oil,
-improve volume to sweep oily efficient,
-discern the output of each oil exit pipe and in relevant oil exit pipe, seek the part heterogeneous body problem of suitable solution with the correction reservoir,
-for some embodiment, particularly working as carminative injects by main shaft, utilize the segregation phenomenon of specific gravity very inequality in the reservoir, make cap rock form the gas umbrella by gas jet or water vapour at reservoir, because the gradient of oil exit pipe is very big and be similar to level, need not prematurely oil exit pipe to be holed
-attenuating is injected at the outer fluid loss of topped area by system,
-being positioned near the produce oil center, only arrange an infusion source.
The present invention relates to form the exploitation method of effluent in the geological stratification of reservoir (or oil-producing formation) of described effluent, use a bite centerwell, at least one like a horizontal oil exit pipe and a carminative, described geological stratification is topped obviously to be to the impervious geological stratification of described effluent (or non-permeable formation) at another, interface between described two geological stratifications is called as the underlying strata (underlying the non-permeable formation of oil reservoir) of described reservoir, and described carminative impels the migration of waiting to exploit effluent.
According to the first change scheme of the present invention, described carminative is begun to inject described geological stratification from centerwell.
Apply to exploit the second change scheme of viscosity oil effluent according to the present invention, can use a bite centerwell as oil-producing well and at least one like horizontal well as strengthening oil-producing well.Strengthen oil well from surface drilling, pass oil-producing formation and enter described non-permeable formation and be connected with oil-producing well, described reinforcement oil well has just like horizontal component at least in described oil-producing formation.
Strengthening oil well can hole on the part of its length, and this part obviously is the part that is equivalent to pass the reinforcement oil well of oil-producing formation.
People can be adapted to reduce in the fluid injection reinforcing oil exit pipe for the treatment of recover petroleum effluent viscosity with one, thereby increase the effluent flow velocity of strengthening in the oil well.
People can insert a packer and strengthen in the oil exit pipe, and packer is placed in the boring part of strengthening oil exit pipe.
People also can be placed on a packer to be contained in the non-oil-producing formation in the described reinforcement oil exit pipe part.
It obviously is on the boundary of oil-producing formation and non-oil-producing formation that people also can be placed on a packer.
Strengthening oil exit pipe is after entering oil-producing formation, but before arriving oil-producing well, interrupt.
The above-mentioned first change scheme according to the present invention, people can begin to inject carminative and use many like horizontal oil exit pipe from a bite centerwell.
According to of the present invention one inferior change scheme, the vertical centre well is not only to be used for by guiding ground into like the collected effluent of horizontal oil exit pipe, and it is equipped with the special completion of a bite, thereby also fluid can be injected reservoir.
In general, this inferior change scheme relates to the exploitation method that contains effluent in the geological stratification that forms described effluent reservoir, utilize a bite centerwell, some are like horizontal oil exit pipe and carminative, described geological stratification is topped obviously to be to effluent above impervious geological stratification at another, and the interface between described two geological stratifications is called as the underlying strata of described reservoir.The method is characterized in that described carminative is begun to inject described geological stratification from centerwell, described carminative impels the migration of waiting to exploit effluent, and being that this effluent is that described seemingly horizontal oil exit pipe drives to the transition of centerwell bottom, effluent then begins to exploit on the ground from down-hole, center portion.
According to this inferior change scheme, people can collect effluent to be exploited like horizontal oil exit pipes by being positioned on every side some of described centerwell.
In addition, according to this inferior change scheme, people can drive effluent described to be exploited to the low level of described centerwell bottom up to the underlying strata of described reservoir.
According to another inferior change scheme, the vertical centre well is not used in by guiding ground into like the collected effluent of horizontal oil exit pipe, but it is equipped with a completion so that fluid is injected reservoir, and Here it is itself is used for will waiting to exploit effluent guiding ground like horizontal oil exit pipe.
In general, the inferior variant scheme of this novelty relates to the method that an exploitation is contained in the effluent that (forms the reservoir of described effluent) in a kind of geological stratification, this method is utilized a bite centerwell and Duo Gen seemingly oil exit pipe and a kind of carminative or the oil displacement agent of level, described geological stratification be covered in obviously to described effluent impervious another above geological stratification, the interface foot is called the underlying strata of described oil reservoirs between the described geological stratification.This method is characterised in that: from described centerwell, inject described carminative to described geological stratification, and described carminative causes the migration of waiting to exploit effluent, wait to exploit effluent and then transport earthward by described oil exit pipe like level.
According to this inferior variant scheme, we can exploit described effluent by being positioned at described centerwell seemingly horizontal oil exit pipe on every side.
The present invention relates to the effluent mining system that is included in a kind of geological stratification equally, and it comprises the seemingly oil exit pipe of level of a bite centerwell and Duo Gen.This system is characterised in that: described main shaft comprises one and is positioned at the bore area of described geological stratification horizontal plane, an injection catheter that connects described bore area and drive the product infusion source, and described oil exit pipe like level leads to described geological stratification.
A kind of embodiment according to this mining system, main shaft can also comprise one that isolate with bore area and be positioned at transition region below the described bore area, described transition region is to link to each other with ground by the oil recovery conduit, and, described oil exit pipe like level by described geological stratification so that converge described transition region.
The mining system that is used for this enforcement pattern can comprise a pipe that is positioned at described well equally, and it has constituted the oil recovery conduit.The injection pipeline can be made of the annular space that described main shaft limited.Described pipe can comprise a packer, and packer separates bore area and transition region.
This pipe can pass described packer.
The oil recovery conduit can comprise a pump, and it is positioned at the lower end of transition region inner catheter, and the pipe that forms described oil recovery conduit can slide at described Sai Mennei.
The cross section that transition region can have can so just form a collection graben of product effluent greater than the cross section on centerwell top.
Can advantageously be applied to following occasion according to system of the present invention, that is: described geological stratification be covered in another for wait to exploit the impervious geological stratification of effluent above.In this used, described collecting region can be to be positioned at described non-permeable formation at least in part, and the described seemingly oil exit pipe of level can converge to described transition region by described non-permeable formation again after passing oil-producing formation.
According to another possible embodiment, by geological stratification can have such length like the oil exit pipe of level, that is: interrupt locating like the oil exit pipe of level with a certain distance from the axis (not having no) of main shaft.
Injector well can comprise a packer.
Can advantageously be applied to following occasion according to system of the present invention, that is: to be covered in another be on impervious geological stratification for effluent to be exploited to described geological stratification.In this uses, collect oil exit pipe and can be apparently remain the contiguous place that production flow goes out the interface between the geological stratification of thing and interrupt at described impermeable geological stratification and described containing.
Below, coming embodiment is described by accompanying drawing, accompanying drawing represents to contain the exploitation of the geological stratification of oil effluent, and this will have a better understanding to the present invention, and its advantage is also more very clear.
-Fig. 1 demonstrates a bite main shaft and strengthens the configuration of well (or service well) flatly, and this system can realize the method according to this invention,
-Fig. 2 illustrates according to exploitation of the present invention machine-processed visually,
-Fig. 3 and Fig. 4 represent according to various variant scheme of the present invention,
-Fig. 5 and Fig. 6 illustrate visually to containing total figure that a kind of geological stratification of remaining to be exploited the viscosity effluent is exploited,
-Fig. 7 and Fig. 8 illustrate two kinds of variant schemes visually, and promptly centerwell is used to inject carminative.
Fig. 1 represents the embodiment according to a kind of variant scheme of the inventive method, so that 2 begin a kind of geological stratification 1 is produced from ground.Geological stratification 1 contains a kind of viscosity oil effluent to be exploited.
Reference symbol 4 expression 2 pulls out of hole and passes a bite main shaft of oil-producing formation 1 from ground, and this main shaft interrupts at 5 places of non-permeable formation 3.
Under the situation of Fig. 1, oil-producing formation is covered by another geological stratification that indicates reference symbol 6, this covering layer be called () layer.
On Fig. 1, this strengthens well and passes upper strata 6 and oil-producing formation 1, feeds impervious bottom 3 then so that converge with main shaft on this bottom horizontal plane.
More in general, according to the present invention, a kind of geological stratification horizontal plane place of service well below being positioned at oil-producing formation feeds main shaft, and this creeps at service well and carries out after treating the impervious geological stratification of production fluid.
On Fig. 1, reference symbol 8 expressions are strengthened well or are strengthened the place that oil exit pipe 7 creeps into oil-producing formation 1, and the exit point that reference symbol 9 is represented to strengthen wells or strengthened oil exit pipe 7.Reference symbol 10 expressions are included in the reinforcement well part in the oil-producing formation 1.
Certainly, according to this variant scheme, more preferably: 10 parts that are arranged in the reinforcement oil exit pipe 7 of oil-producing formation 1 will be grown as much as possible.
Under the situation of Fig. 1, use a kind of hardening agent of circulation in strengthening oil exit pipe 7.This hardening agent causes waiting exploiting the reducing of viscosity (effluent to be exploited is adjacent to oil exit pipe) of effluent.Then, wait to exploit effluent and flow to main shaft 4 by strengthening oil exit pipe itself.
Far and away, the part 10 of reinforcement oil exit pipe 7 is positioned at oil-producing formation 1.When this part is not to constitute when finding well (or seeing oil well) flatly, can before dropping to well, it be holed, and this boring part of oil exit pipe is normally named by english terminology " bushing pipe ", perhaps holes at the scene.On the other hand, also may stop up some borings of strengthening oil exit pipe 7 fall.
Fig. 2 illustrates visually according to second kind of exploitation pattern of the present invention.According to this pattern, the part 10 that is positioned at the reinforcement oil exit pipe of oil-producing formation 1 is only holed on two parts 11 and 13 of its length, is mounted with a packer 17 so that these two parts are separated in described oil exit pipe.
We are injected into a kind of can making and are arranged in the hardening agent that oil-producing formation 1 treats that the viscosity of recover petroleum effluent reduces in strengthening oil exit pipe 7, injecting this stimulant is for the ease of waiting to exploit flowing of effluent.
Other products be formed or be contained to such hardening agent can by steam, such as a kind of solvent of hydrocarbon-based.
In described embodiment, the hardening agent of being considered will be a steam.
The steam of being injected into by ground is penetrated into oil-producing formation 1 by 11 the top of holing.
The diffusion of steam in oil-producing formation 1 is to represent it with arrow 12.
The steam heat packs is contained in the oil effluent concrement of oil effluent particularly in the oil-producing formation 1, can lower the viscosity of waiting to exploit effluent, and therefore, it is mobile to 13 the bottom of holing that some waits to exploit effluent.
The mobile of product effluent represented with arrow 14.
This flows and occurs in the bottom direction of strengthening well 10, is because gravity is owing to strengthening the barometric gradient that occurs successively decreasing on the well direction on the other hand on the one hand.
Successively decreasing of barometric gradient is because reinforcement well 10 is associated with main shaft 4, and main shaft 4 itself is connected with ground, therefore obviously is under the surface air pressure.
Wait that exploiting the mobile of effluent is to be undertaken by the part that is arranged in bottom geological stratification 3 reinforcement oil exit pipes 15, flow to main shaft 4 always, assemble in the bottom of main shaft 4.
This is flowing on Fig. 2 represents with arrow 16.
So the lifting of the effluent of exploitation, for example promotes by the pump 21 by ground controlling from main shaft 4 with typical method.
Under the occasion of embodiment described above, boring part 11(steam sets out thus and is diffused into oil-producing formation) and boring part 13(wait to exploit flowing of effluent and begin thus to carry out) between separation finish by means of insertion packer 17.In the case, steam 12 is forced to discharge from the auxiliary oil exit pipe of the upstream that is arranged in packer 17, and the oil effluent is then exploited at 14 places, packer downstream.So, be convenient to control separate locations.
The steam 12 that a part is injected into spreads in oil-producing formation 1, just to well 4 directions diffusions, so, cleaned belong to oil-producing formation and of being included between the part 10 of strengthening oil exit pipe 7 and the main shaft vast by regional 20.This part is by arrow 19 expressions, and causes that directly effluent to be exploited enters well 4, and this is by arrow 22 expressions.
Might be oil-producing formation 1 and fluid-tight bottom 3(Fig. 3) the interface limit place of separating settles a packer 18, and according to this variant scheme of the present invention, the reinforcement oil exit pipe 7 of being holed on whole length appears in the oil-producing formation.
Far and away in the case, the bottom 15 of strengthening oil exit pipe 7 can not be exploited.All exploitations are directly to carry out in well 4, as represented by arrow 22.Strengthen oil exit pipe 7 and only be used to inject hardening agent.This is by arrow 19(Fig. 3) represented.
Fig. 5 and Fig. 6 demonstrate the production general flow chart.Main shaft 4 is the reinforcement well (7a～7i) center on by some.
On Fig. 5, these are strengthened well and equate with the distance of main shaft 4 on the ground.This is not enforceable at all, and (distance that 7a～7i) leaves main shaft should be arranged on the place that is suitable for exploiting oil-producing formation most and strengthen well.
Reference symbol 8a～8i represents that oil exit pipe 7a～7i penetrates the place in the oil-producing formation 1, and reference symbol 9a～9i represents that oil exit pipe 7a～7i passes the place of oil-producing formation 1.
So, might be by packer be injected 9a ... 9i and develop whole shaded area 23(Fig. 6).
Under the represented situation of Fig. 6, some 9a～9i is equidistant for main shaft 4, but this is not enforceable at all.
When we utilize packer 17, might change the position of packer 17 along with the exploitation of different regions.
So,, might and be located in the oil-producing formation, approach the interface 25 between top layer 6 and the oil-producing formation 1 packer 17 location for start injection.Then, along with exploitation is pushed ahead, packer 17 might descend.Reverse situation is possible equally, the plug door 17 following interfaces 25 that are arranged between the most close as far as possible oil-producing formation 1 and the bottom 3, then along with the exploitation of oil-producing formation, is risen in the position of packer 17 when just beginning again.
If when on strengthening well 7, holing, and experience difficulties, strengthening well is to be positioned at oil-producing formation, then might be satisfied with to utilize and strengthen well as a reinforcement injection oil exit pipe.Represent it with Fig. 4, wherein, 7 of oil exit pipes are used to inject stimulant.
According to another variant scheme, centerwell is intended for (Fig. 7) of injection carminative, and this vertical centre well 101 is the lower walls 102 that always get into oil reservoirs 113, then setting of casing and use cemented.Therefore, sleeve pipe 103 stops the fluid of all oil reservoirs to flow into centerwell.
We are called the bottom of the geological stratification that contains the oil effluent underlying strata of oil reservoirs.And the coboundary of this geological stratification is called the cap rock of oil reservoirs.
Then,, drilling well is advanced with bigger diameter, be used to reclaim by like the collected fluid of the oil exit pipe 106 of level so that form a trench 105 by means of hole enlarger under the sleeve pipe that is positioned at the stratum (or rock stratum) 104 under the reservoir.This trench is to be called " filling out well letter (or packing) " by means of a common english terminology of seal pack device 107() to separate the remainder of well, but allow a conduit 108 by this trench, this conduit 108 is used for by pumping installations 109 the fluid yield of collecting being risen to ground.Seal pack device 107 can be furnished with a slip joint can move both vertically conduit, guarantees perfect sealing simultaneously again.Conduit 108 can comprise several pipe elements of tandem array each other.
Gathering-device is to finish by the boring like the oil exit pipe 106 of level, from ground until collecting trench 105, each root oil exit pipe and oil reservoirs underlying strata 102 intersect at a point 110, this point 110 is the function of oil exit pipe gradient to the distance of centerwell, it is an important parameter of system, this is because all oil productions all will be discharged from oil reservoirs this point 110 from fluid in position or the fluid that is injected into.The produce oil flow of system will be to select by such method, and consequently the liquid level in trench is to be lower than the oil reservoirs underlying strata gradient all the time, so that make collected fluid by discharging with the oil exit pipe on oil reservoirs right side.
The injection of the fluid that is used for making fluid on the original position to flow or moves is holed at the sleeve pipe 103 of centerwell 101 by conventional method by perforation 111() in oil reservoirs 113, carry out.Stimulation and acidization by oil reservoirs on the perforation horizontal plane can be improved the contact effect.The size of these perforations 111 can be selected after simulation by means of the digital process that plays a role of can representing to flow, so that injecting fluid (hot water, steam, carbon dioxide, coal gas, foam etc.) is penetrated in the oil exit pipe to obtain best oil reservoirs volume cleaning rate.The parameter that should consider is in addition: oil reservoirs thickness, oil viscosity in position, oil exit pipe are with respect to number of the exit point from oil reservoirs of horizontal angle, each oil exit pipe, injection flow, oil exit pipe or the like.
Under injecting fluid is the occasion lighter than in position oil, we will utilize the Gravity Separation effect, and the Gravity Separation effect can obtain at carminative and wait to exploit interfacial a kind of umbrella body form between the effluent.Along with putting off of time, this umbrella shape bodily form is centered around around the centerwell and enlarges to the side.The parameter of more than enumerating can be calculated the boundary that is consequently reached by umbrella body in this wise and be actually the oil exit pipe (on the plane separately of each oil exit pipe) that is parallel to like level.So, in even mode oil is driven to oil exit pipe.
In the starting stage of exploitation, the system of recommending for the front, under the situation of heavy-oil reservoir oil reservoir, good is carries out the continuous circulation of steam so that reduce to improve flowing of fluid by viscosity in oil exit pipe.
So, according to this variant scheme, carminative or oil displacement agent 115 be the annular space 116 that is limited from sleeve pipe 103 and conduit 108(is positioned at this sleeve pipe 108 and by playing perforation 111 transition on this same sleeve pipe) begin to be transported to oil-producing formation 113.
Carminative will spread and cause the oil effluent to oil extraction gatherer 106 migration in oil-producing formation 113, oil extraction gatherer 106 is holed on it is positioned at the length part of oil-producing formation 113.
Oil exit pipe 106 is collected the oil spilling (from trench exploitation oil spilling) in oil effluent and the trench 105.
Certainly, obtain good result, must use to be positioned at vertical centre well several collection oil exit pipes all around in order to make the method according to this invention.
According to another variant scheme, centerwell is to be used to inject carminative (Fig. 8), and this vertical centre well 201 is the underlying stratas 202 that creep into oil reservoirs 213, then setting of casing and water cement and fix.So, sleeve pipe 203 has stopped that the fluid of oil reservoirs all flows to centerwell.
The meaning of the underlying strata of oil reservoirs is meant the bottom of the geological stratification that contains the oil effluent, and the cap rock of oil reservoirs is meant the last interface of this geological stratification.
Interrupt boring at that time.Proceed to the stratum 204 that is positioned at below the oil reservoirs if drill, this continuation partly will advantageously make with the remaining part of well by a seal pack device 207 to be isolated, forbidden that like this spawn leads to the continuation part of well, so that realize making the continuation of well partly to be provided with the back use.
Especially comprise several geological stratifications of waiting to exploit effluent, and these geological stratifications are when being separated for the impervious geological stratification of effluent, can consider the continuation part of well when having.
According to illustrated embodiment, wait to exploit the gathering-device of effluent or system and be (the beginning up to oil-producing formation 213) of realizing by to boring like the oil exit pipe 206 of level from ground, the underlying strata 202 of each oil exit pipe and oil reservoirs intersects at decentre well 1: 210 place, and, obviously be on the horizontal plane of this point, to interrupt.
The injection of the fluid that is used for making fluid on the original position to flow and moves is to realize by sleeve pipe 203 borings of conventional method in centerwell 201 by perforation 211() in oil reservoirs 213, carry out.Reinforcement and acidization by oil reservoirs on the perforation horizontal plane can be improved the contact effect.The size of these perforations 211 can be selected after simulating by means of the digital process that play a role of can representing to flow, so that injecting fluid (hot water, steam, carbon dioxide, coal gas, foam etc.) is penetrated in the oil exit pipe 206.The parameter that should consider is in addition: oil reservoirs thickness, oil viscosity in position, oil exit pipe are with respect to number of the exit point from oil reservoirs of horizontal angle, each oil exit pipe, injection flow, oil exit pipe or the like.
Under injecting fluid is the occasion lighter than in position oil, we will utilize the Gravity Separation effect, and the Gravity Separation effect can obtain for carminative and wait to exploit interfacial a kind of umbrella body form between the effluent.Along with putting off of time, this umbrella body form enlarges to the side around centerwell.The parameter of more than enumerating can be calculated the boundary that is consequently reached by umbrella body in this wise and be actually the oil exit pipe (on the plane separately of each oil exit pipe) that is parallel to like level.For this reason, oil will drive to oil exit pipe in even mode.
For this reason, according to this variant scheme, oil displacement agent 215 is to begin and be introduced in the oil-producing formation 213 from main shaft, and the transition by beating perforation 211 on same sleeve pipe.
Oil displacement agent will spread and cause the oil effluent to oil extraction gatherer 206 migration in oil-producing formation 213, oil extraction gatherer 206 is holed on it is positioned at the length part of oil-producing formation 213.
Oil exit pipe 206 is collected the oil effluent and is mined to ground 209 respectively from each oil exit pipe.The carrying out of exploitation or by natural force, or by means of pump.These pumps can be placed in ground or at least in some inside like the oil exit pipe of level of oil-producing formation horizontal plane.
So, according to the present invention, the oil effluent is exploited from the oil exit pipe that is centered around main shaft seemingly level all around.These oil exit pipes are running into before the main shaft axle and are being the interruption of certain distance L place from this axle.Therefore, the present invention can allow to improve oil reservoirs exploitation capacity.
Under the situation of accompanying drawing, seemingly the oil exit pipe of level interrupts on underlying strata 202 horizontal planes apparently, yet, if oil exit pipe interrupts, be not considered to run off scope of the present invention before or after this underlying strata yet.
Claims (29)
1, exploitation forms the method for the middle effluent of geological stratification (or oil-producing formation) of described effluent reservoir, use a bite centerwell, at least one like horizontal oil exit pipe and carminative, described geological stratification topped another obviously be to the impervious geological stratification of described effluent (or non-permeable formation) above, interface between described two geological stratifications is called as the underlying strata of described reservoir, described carminative impels the migration of waiting to exploit effluent, it is characterized in that described carminative is begun to inject described reservoir and is that described seemingly horizontal oil exit pipe drills from ground from described centerwell.
2,, it is characterized in that beginning to inject described carminative and being to use many like horizontal oil exit pipe from centerwell according to the exploitation method of claim 1.
According to the exploitation method of claim 2, it is characterized in that 3, the described production fluid for the treatment of is the bottom transition that is driven to centerwell by described seemingly horizontal oil exit pipe, effluent then begins to exploit earthward from down-hole, center portion.
4,, it is characterized in that collecting effluent described to be exploited like horizontal tube by being positioned on every side some of described centerwell according to the method for claim 3.
5,, it is characterized in that effluent described to be exploited is driven to the low level of described centerwell bottom up to the underlying strata of described reservoir according to the method for claim 3.
6,, it is characterized in that guiding effluent to be exploited into ground like horizontal oil exit pipe by more described according to the method for claim 2.
7,, it is characterized in that being positioned on every side some of described centerwell by all exploits described effluent like horizontal oil exit pipe according to the method for claim 6.
8, exploitation forms the method for the middle viscosity oil effluent of geological stratification (or oil-producing formation) of described effluent reservoir, use a bite centerwell, at least one like horizontal oil exit pipe and carminative, described geological stratification is topped obviously to be to effluent above impervious geological stratification (or non-permeable formation) at another, interface between these two geological stratifications is called as the underlying strata of reservoir, described carminative impels the migration of waiting to exploit effluent, according to said method, use centerwell as oil-producing well, it is characterized in that described carminative is begun to inject described geological stratification from described like horizontal oil exit pipe, described seemingly horizontal well is equivalent to strengthen flatly oil-producing well, described reinforcement oil well is to drill from ground, and pass described oil-producing formation and enter non-permeable formation and be connected with described oil-producing well, described reinforcement oil well at least in described oil-producing formation some like level.
9, according to the method for claim 8, it is characterized in that described reinforcement oil well is holed on the part of its length, the obvious part with the described reinforcement oil well that passes oil-producing formation of a described length part is consistent.
10,, it is characterized in that and to treat the viscosity of recover petroleum effluent in a kind of fluid injection reinforcing oil exit pipe with reduction according to the method for claim 9.
11,, it is characterized in that a packer is inserted in the described reinforcement oil exit pipe, and it is characterized in that described packer is placed in the described boring part of described reinforcement oil exit pipe according to the method for one of claim 9 or 10.
12,, it is characterized in that the packer in the described reinforcement oil exit pipe is placed on the described oil exit pipe part that contains in the non-oil-producing formation according to the method for one of claim 9 or 10.
13, according to the method for one of claim 9 or 10, it is characterized in that the packer in the described reinforcement oil exit pipe is placed on obviously is on the boundary of oil-producing formation and non-oil-producing formation.
14, according to the method for claim 8, it is characterized in that described reinforcement oil exit pipe is after entering oil-producing formation, but before arriving oil-producing well, interrupt.
15, according to claim 8-10, one of 14 method, it is characterized in that using some to center on the reinforcement oil exit pipe of oil-producing well.
16, by the method for claim 11, it is characterized in that using some to center on the reinforcement oil exit pipe of oil-producing well.
17, by the method for claim 12, it is characterized in that using some to center on the reinforcement oil exit pipe of oil-producing well.
18, by the method for claim 13, it is characterized in that using some to center on the reinforcement oil exit pipe of oil-producing well.
19, the mining system that contains effluent in the geological stratification, comprise that a bite centerwell and some are like horizontal oil exit pipe, described like horizontal oil exit pipe (106,206) enter geological stratification (113,213), described geological stratification (or oil-producing formation) is topped on another obviously is the geological stratification (or non-permeable formation) of impermeable effluent, it is characterized in that described main shaft (101,201) have at described geological stratification (113,213) bore area on the horizontal plane (111,211), the pipeline that described bore area (111,211) and carminative infusion source (115,215) are connected, and it is characterized in that to be to drill and pass described oil-producing formation from ground like horizontal well, to enter non-permeable formation and be connected described with described oil-producing well.
20, according to the mining system of claim 19, it is characterized in that described main shaft (101) also has a transition region (105) that is positioned at below the described bore area and isolates with bore area, described transition region links to each other with ground by a produce oil pipeline (108), and it is characterized in that described seemingly horizontal oil exit pipe (106) passes described oil-producing formation (113) and is connected with described transition region.
21, according to the mining system of claim 20, it is characterized in that it has a pipe (108) that is positioned at main shaft and constitutes the produce oil pipeline, be that injection pipeline is made up of the annular space that described main shaft (101) and described pipe are limited, and be that main shaft has one the packer (107) of bore area and transition region isolation.
22,, it is characterized in that described pipe (108) passes described packer (107) according to the mining system of claim 21.
23, according to the mining system of claim 22, it is characterized in that described produce oil pipeline (108) has a pump that is positioned at transition region (105) produce oil lower end of duct, and be that the pipe (108) of forming described produce oil pipeline (108) can slide in described packer.
24, according to the mining system of one of claim 20-22, it is characterized in that described produce oil pipeline (108), the lower end of the described produce oil pipeline in transition region has a pump (109).
25,, it is characterized in that effective cross section, effective cross section that transition region (105) has, thereby form the collection ditch (105) of exploitation effluent greater than main shaft (101) according to the mining system of one of claim 20-23.
26, according to the mining system of claim 20-23, it is characterized in that being applied to described geological stratification (oil-producing formation), topped production flow to be gone out thing at another be under the condition above impervious geological stratification, described collecting region is arranged in non-permeable formation at least partially, and be described like horizontal oil exit pipe after passing oil-producing formation, enter described non-permeable formation and link to each other with described transition region.
27, according to the mining system of claim 19, it is characterized in that it is such to the length that is had that described seemingly horizontal oil exit pipe (206) passes described oil-producing formation (213), the distance of promptly leaving the axis of described main shaft (201) is not zero but L.
28,, it is characterized in that it has a packer (207) according to the mining system of claim 27.
29, according to the system of one of claim 27 or 28, it is characterized in that being applied to oil-producing formation, topped production flow to be gone out thing at another be under the condition above impervious geological stratification, and described obviously is to remain the near interface that production flow goes out between the thing geological stratification and interrupt at described impermeable geological stratification and described containing like horizontal oil exit pipe.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR86/09.420 | 1986-06-26 | ||
| FR8609419A FR2600713B1 (en) | 1986-06-26 | 1986-06-26 | ASSISTED PRODUCTION METHOD OF A VISCOUS EFFLUENT CONTAINED IN A GEOLOGICAL FORMATION |
| FR8609422A FR2600714B1 (en) | 1986-06-26 | 1986-06-26 | METHOD AND SYSTEM FOR ASSISTED PRODUCTION BY INJECTION FROM A CENTRAL WELL OF A MOVING AGENT |
| FR86/09.422 | 1986-06-26 | ||
| FR86/09.419 | 1986-06-26 | ||
| FR8609420A FR2601998B1 (en) | 1986-06-26 | 1986-06-26 | METHOD AND SYSTEM FOR PRODUCTION BY CENTRAL WELL AND COLLECTION DRAINS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1030117A CN1030117A (en) | 1989-01-04 |
| CN1014337B true CN1014337B (en) | 1991-10-16 |
Family
ID=27251376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87104473A Expired CN1014337B (en) | 1986-06-26 | 1987-06-26 | Method of assisted production of effluent to be produced contained in geological formation |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5016710A (en) |
| EP (1) | EP0251881B1 (en) |
| CN (1) | CN1014337B (en) |
| BR (1) | BR8703209A (en) |
| DE (1) | DE3778593D1 (en) |
| IN (1) | IN169933B (en) |
| NO (1) | NO872640L (en) |
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- 1987-06-24 NO NO872640A patent/NO872640L/en unknown
- 1987-06-25 BR BR8703209A patent/BR8703209A/en not_active IP Right Cessation
- 1987-06-26 CN CN87104473A patent/CN1014337B/en not_active Expired
- 1987-06-26 IN IN467/MAS/87A patent/IN169933B/en unknown
- 1987-06-26 US US07/066,534 patent/US5016710A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US5016710A (en) | 1991-05-21 |
| DE3778593D1 (en) | 1992-06-04 |
| EP0251881A1 (en) | 1988-01-07 |
| NO872640D0 (en) | 1987-06-24 |
| EP0251881B1 (en) | 1992-04-29 |
| IN169933B (en) | 1992-01-11 |
| CN1030117A (en) | 1989-01-04 |
| BR8703209A (en) | 1988-03-15 |
| NO872640L (en) | 1987-12-28 |
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